2G2 



BLACK POPLAR 



Venation not strict-pinnate. Leaf neither 

 viscid-glandular, nor sharply bi-serrate. 



I~l Venation pseudo-palmate at the base, the 

 loiver secondaries longest : reticulation 

 marked. Buds viscoits. Petioles com- 

 pressed. 

 Leaves broad, deltoid or sub-rhomboid 

 acuminate; hardly paler beneath ; mar- 

 gin cartilaginous and coarsely serrate. 

 Stomata above as numerous as beneath. 

 $ Shoots terete or nearly so. 



Fig. 95. a Black Poplar, Populus nigra ; b Populus Canadensis, 



p. 263 (Sc). 



